Osmosis Review

1. Hypertonic solutions• Plant cells the central

vacuole loses water and the cells shrink causing wilting.

• Animal cells shrink (plasmolysis)

2. Hypotonic Solution• Plant cells CV fills with

water, plant becomes stiff and rigid, CW keeps the plant from bursting

• Animal cells swell, may burst (“LYSIS”)

3. Isotonic solutions

• Plant cells• Equilibrium

• Animal cells - water moves back and forth – no change – GOOD!!!

Predict what would happen to the cells below….

• 1. RBC – hypotonic solution• 2. Elodea – isotonic solution• 3. Paramecium – hypertonic solution

LAB: Osmosis in Elodea

Let’s review the Osmosis Lab

Red onion cells

How do animal cells react differently?